Windshield wiper



Filed March 14, 1928 Patented O t. 8, 1929 UNITED STATES.

PATENT OFFICE LEWIS O. DIMICK, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, T0 GEORGE E. LA VIETES, OF NEW HAVEN, CONNECTICUT wmnsnrnnn 'WIPER Application filed March 14, 1928. Serial No. 261,480.

This invention relates to an improvement in wind-shield wipers and has for its object the production of an effective and reliable device of the class described, constructed with particular reference to its provision with improved and readily-releasable means for yieldingly maintaining'the wiper-blade against the wind-shield glass.

With this object in view, my invention consists in a wind-shield wiper characterized by its provision with an operating-shaft; a depending wiper-carrying arm pivoted to the said shaft in such manner as to swing toward and away from the glass of a wind-shield, and carrying a wiper-blade; and a spring tension-arm provided atits upper end with means for securing it to the said shaft and provided at its lower end with a rear-wardlyopening socket for the reception of the said wiper-carrying arm; whereby the latter may be readily disengaged from the said spring tension-arm and swung, together with the wiper-blade, away from the wind-shield to pe'rmitthe cleaning thereof.

In the accompanying drawings:

' Fig. 1 is a view in side elevation of a windshield wiper constructed in accordance with my invention and shown as installed in a wind-shield frame, which latter, together with the glass wind-shield proper, is shown in vertical section;

Fig. 2 is a view thereof in front elevation;

Fig. 3 is a detail sectional view on the line 33 of Fig. 1; and

Fig. 4 is a detached perspective view of the spring tension-arm.

In carrying out my invention as herein shown I employ a spring tension-arm 10 comprising an outwardly and downwardly bowed reach 11, the respective opposite sideedges of the lower extremity of which are folded rearward, parallel with each other, to form a rearwardly-opening socket 12 for the reception of a dependingwiper-carrying arm 13 which carries at its lower end a sheetmetal clip 14 of usual form and comprising two arms 15 respectively positioned upon the opposite sides 0 the frame 16 of the rubber wiper-blade 17 and connected to the said frame by means of a transverse screw 18 in the usual manner. The opposite extremity of the tension-arm 10 is folded to form a substantially-cylindrical horizontally-arranged sleeve 19 adapted to snugly fit over the projecting outer end of an operating-shaft 20 which is formed with a diametrical socket 21 to receive the laterally-offset upper end 22 has its sleeve 19 preferably positioned between the socket 21, in which the upper end of the depending arm 13 is located, and the front face of the rail 23, and has its reach 11 so shaped to cause the same to exert inward pressure upon the said depending wipercarrying arm 13. As the operating-shaft 20 is oscillated back and forth, whether by its lever 25 or other suitable means, it will cause, through the medium of the depending arm 13, the wiper-blade 17 to sweep back and forth across the outer face of the glass 24. The movement just described of the shaft 20 and depending wiper-carrying arm 13 would he participated in by the spring tension-arm 10.

In the event that it is desired to swing the wiper-blade outward away from the surface 1 of the glass, so as to permit the same to be cleaned, this may be accomplished either by pushing in on the arm 13-, so as to disengage it from the socket 12, or by pulling outward on the lower end of the reach 11 of the spring tension-arm to disengage it from the said depending arm. After this disengagement has been effected, the arm 13, together with the wiper-blade and parts 14, 15, 16 and 18, may be swung outward as indicated by broken lines in Fig. 1.

As shown, the operating-shaft 20, or an equivalent member, is operated by means of the hand-lever 25, but it is obvious withoutfurther illustration that it may be operated electrically by vacuumopby any other of the well-known automatic operating devices, without departing from my invention.

I claim:

1. As a new article of manufacture a spring tension-arm for wind-shield wipers formed of a single piece of sheet-metal and consisting of a sleeve adapted to receive an operatingshaft; a bowed reach arranged in line with the longitudinal axis of the said sleeve and extending outward and downward therefrom; and an open-sided socket formed at the end of the said reach opposite the said sleeve for the reception of a wiper-carrying arm or other 'part of a wind-shield wiper.

2. As a new article of manufacture a spring tension-arm for wind-shield wipers formed of a single piece of sheet-metal and consisting of a longitudinally-slotted sleeveadapted to receive and yieldingly grip an operatingshaft; a bowed reach arranged in line with the longitudinal axis of the said sleeve and extending outward and downward therefrom; and an open-sided socket formed at the end of the said reach opposite the said sleeve for the reception of a wiper-carrying arm or other part of the wind-shield Wiper.

In testimony whereof, I have signed this specification.

LEWIS O. DIMICK. 

